The AT27C4096-90JU from Microchip Technology is an EPROM (Erasable Programmable Read-Only Memory) chip that offers a 4Mbit (256K x 16) storage capacity. This device is one-time programmable, meaning that its contents cannot be modified or erased once programmed, making it highly secure for storing critical data or code.With a fast access time of 90ns, the AT27C4096-90JU ensures efficient data retrieval and execution, making it suitable for applications where speed is crucial. The chip is housed in a 44-Pin PLCC (Plastic Leaded Chip Carrier) package, providing reliable electrical connections and ease of installation.Supplied in a tube packaging format, the AT27C4096-90JU is ready for integration into industrial, automotive, consumer electronics, or other applications requiring non-volatile memory storage. Microchip Technology's AT27C4096-90JU offers a dependable and secure solution for applications that demand reliable data storage and swift access times.